Chronograph 7413-9

A Longines steel flyback chronographFlyback chronographA chronograph whose reset pusher can be pressed during timing to return the hands to zero. A new measurement begins when the pusher is released, without a separate stop operation. case reference, documented by a photographed inner back stamped 7413 9. The reviewed medical dial has a blue pulsometerPulsometerA chronograph scale estimating heartbeats per minute from the time taken to count the number of beats specified on the dial. graduated for 30 beats; the case suffix alone does not authenticate every dial pairing.